(a)
Interpretation:
The increasing order of radius of given pairs have to be arranged and the same has to explained.
Concept introduction:
The distance from centre of nucleus to the valence shell electron of an atom or ion is called atomic or ionic radius.
Radius of parent atom is always higher than the size of cation.
Radius of parent atom is always smaller than the size of anion due to the effective nuclear charge.
(b)
Interpretation:
The increasing order of radius of given pairs have to be arranged and the same has to explained.
Concept introduction:
The distance from centre of nucleus to the valence shell electron of an atom or ion is called atomic or ionic radius.
Radius of parent atom is always higher than the size of cation.
Radius of parent atom is always smaller than the size of anion due to the effective nuclear charge.
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